Could some expert help me determine whether the cavitation on the turbine rotor blades at this level is serious?
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The last-stage blades of the turbine – is cavitation at this extent as observed? Do I need to replace it?
Personally, it’s better to replace it; otherwise it will continue to operate in a faulty state. Moreover, it’s a piece of equipment that operates at high speeds – just thinking about it is terrifying! :L
Is this phenomenon related to the quality of the steam? It doesn’t matter whether it is changed or not; what’s important is to identify the cause, for reference.
This will result in a loss of rotor balance, leading to vibrations that are unacceptable during operation or exceed the specified limits; in such cases, it is recommended to replace it
Water erosion; the steam quality is not up to standard. As long as the dynamic balance is satisfactory, it’s fine; it comes down to cost. It’s best to exchange it if you have the money.